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Pods/ZLPhotoBrowser/Sources/General/ZLPhotoModel.swift

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+//
+//  ZLPhotoModel.swift
+//  ZLPhotoBrowser
+//
+//  Created by long on 2020/8/11.
+//
+//  Copyright (c) 2020 Long Zhang <495181165@qq.com>
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+
+import UIKit
+import Photos
+
+public extension ZLPhotoModel {
+    
+    enum MediaType: Int {
+        case unknown = 0
+        case image
+        case gif
+        case livePhoto
+        case video
+    }
+    
+}
+
+public class ZLPhotoModel: NSObject {
+    
+    public let ident: String
+    
+    public let asset: PHAsset
+
+    public var type: ZLPhotoModel.MediaType = .unknown
+    
+    public var duration: String = ""
+    
+    public var isSelected: Bool = false
+    
+    private var pri_dataSize: ZLPhotoConfiguration.KBUnit?
+    
+    public var dataSize: ZLPhotoConfiguration.KBUnit? {
+        if let pri_dataSize = pri_dataSize {
+            return pri_dataSize
+        }
+        
+        let size = ZLPhotoManager.fetchAssetSize(for: asset)
+        pri_dataSize = size
+        
+        return size
+    }
+    
+    private var pri_editImage: UIImage?
+    
+    public var editImage: UIImage? {
+        set {
+            pri_editImage = newValue
+        }
+        get {
+            if let _ = editImageModel {
+                return pri_editImage
+            } else {
+                return nil
+            }
+        }
+    }
+    
+    public var second: ZLPhotoConfiguration.Second {
+        guard type == .video else {
+            return 0
+        }
+        return Int(round(asset.duration))
+    }
+    
+    public var whRatio: CGFloat {
+        return CGFloat(asset.pixelWidth) / CGFloat(asset.pixelHeight)
+    }
+    
+    public var previewSize: CGSize {
+        let scale: CGFloat = UIScreen.main.scale
+        if whRatio > 1 {
+            let h = min(UIScreen.main.bounds.height, ZLMaxImageWidth) * scale
+            let w = h * whRatio
+            return CGSize(width: w, height: h)
+        } else {
+            let w = min(UIScreen.main.bounds.width, ZLMaxImageWidth) * scale
+            let h = w / whRatio
+            return CGSize(width: w, height: h)
+        }
+    }
+    
+    // Content of the last edit.
+    public var editImageModel: ZLEditImageModel?
+    
+    public init(asset: PHAsset) {
+        ident = asset.localIdentifier
+        self.asset = asset
+        super.init()
+        
+        type = transformAssetType(for: asset)
+        if type == .video {
+            duration = transformDuration(for: asset)
+        }
+    }
+    
+    public func transformAssetType(for asset: PHAsset) -> ZLPhotoModel.MediaType {
+        switch asset.mediaType {
+        case .video:
+            return .video
+        case .image:
+            if asset.zl.isGif {
+                return .gif
+            }
+            if asset.mediaSubtypes.contains(.photoLive) {
+                return .livePhoto
+            }
+            return .image
+        default:
+            return .unknown
+        }
+    }
+    
+    public func transformDuration(for asset: PHAsset) -> String {
+        let dur = Int(round(asset.duration))
+        
+        switch dur {
+        case 0..<60:
+            return String(format: "00:%02d", dur)
+        case 60..<3600:
+            let m = dur / 60
+            let s = dur % 60
+            return String(format: "%02d:%02d", m, s)
+        case 3600...:
+            let h = dur / 3600
+            let m = (dur % 3600) / 60
+            let s = dur % 60
+            return String(format: "%02d:%02d:%02d", h, m, s)
+        default:
+            return ""
+        }
+    }
+    
+}
+
+public extension ZLPhotoModel {
+    
+    static func ==(lhs: ZLPhotoModel, rhs: ZLPhotoModel) -> Bool {
+        return lhs.ident == rhs.ident
+    }
+    
+}